As you have been charged a fine for drunk and driving and you paid the challan at the District Court. In the application process of IBPS PO you will have to mention the fine you paid in the question “whether any prosecution/conviction/fine/sentence/detention against you has been awarded by a court of law”. Other than the fine you paid, you don’t have to mention anything else in the form.
Driving by a drunken person or by a person under the influence of drugs.ÑWhoever, while driving, or attempting to drive, a motor vehicle,Ñ 1[
(a) has, in his blood, alcohol exceeding 30 mg. per 100 ml. of blood detected in a test by a breath analyser, or]
(b) is under this influence of a drug to such an extent as to be incapable of exercising proper control over the vehicle, shall be punishable for the first offence with imprisonment for a term which may extend to six months, or with fine which may extend to two thousand rupees, or with both; and for a second or subsequent offence, if committed within three years of the commission of the previous similar offence, with imprisonment for a term which may extend to two years, or with fine which may extend to three thousand rupees, or with both.
Reference: Section 185 The Motor Vehicles Act, 1988